| Incident | Fatalities | |
|---|---|---|
 |
Alexander L. Kielland In 1980, the semi-submersible accommodation rig Alexander L. Kielland capsized during a storm after a leg support brace failed. |
123 |
 |
Al Mariyah Whilst skidding the rig cantilever, the jack-up Al Mariyah collapsed and lost its derrick onto the platform below. |
4 |
 |
Maersk Victory A punch-through caused extensive damage to the Maersk Victory while working in Australian waters in 1996. |
0 |
 |
Ocean Prince The UK-built semi-sub Ocean Prince, finder of the first UK offshore oil, broke up off England's east coast during a storm in 1967. |
0 |
 |
Parker 14-J Drilling Barge Failure of the jacking mechanism caused the Parker rig to collapse in 2003. |
0 |
 |
Ranger I After being jacked up on location in 1979, the rig Ranger I collapsed due to fatigue in the stern leg. |
8 |
 |
Sea Gem One of the first drilling rigs in the North Sea, the Sea Gem collapsed in 1965 as a result of metal fatigue. |
13 |
| Transocean 3 A rare self-elevating semi-submersible, the Transocean III capsized and sank East of Orkney after a jackable leg broke away in 1974. |
0 |
